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Finding the Fourth Proportional to 265.15, 397.95 and 126.50

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Solution

The fourth proportional to 265.15, 397.95 and 126.50 is: 189.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.15 : 397.95 = 126.50 : x
  2. Step 2: Convert to fraction form
    265.15/397.95 = 126.50/x
  3. Step 3: Cross multiply
    265.15x = 397.95 × 126.50
  4. Step 4: Simplify right side
    265.15x = 50,338.69
  5. Step 5: Solve for x
    x = 50,338.69/265.15
  6. Step 6: Final answer
    x = 189.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.